The world has once again grieved over another aviation disaster just before the year ends. Unlike the previous incidents where causes and results are apparent, the recent one involving flight QZ8501 of AirAsia Indonesia is a huge puzzle where the pieces needed to fit together are almost nowhere to be found.

What happened in the aircraft? Why is it missing? How did it lost contact with the air traffic control? Where did it go? All these questions echoed all-over the web while authorities are making speculations.

Just as everyone is looking for an answer, we also searched for some clues to help solve the puzzle. Here are few of the facts we’ve gathered about the aircraft.

Flight QZ8501

AirAsia Indonesia Flight QZ8501 is a single-aisle jetliner, specifically Airbus A320-216, with registration PK-AXC, modeS 8A017B and serial number 3648.

Based on Flightradar24, a website for flight tracking, this aircraft has been flying to and from Surabaya, Jakarta, Lombok, Penang, Denpasar, Kuala Lumpur, and Johor Bahru for the last five days before it disappeared on December 27, 2014. Its last successful flight was QZ8298 from Kuala Lumpur 12:45 (UTC) to Surabaya 14:14 (UTC) on that same day. The aircraft first flew on September 25, 2008 and was delivered to AirAsia on October 15, 2008. It had an approximate total accumulated flights of 23, 000 hours over 13, 600 flights. Its engines are two CFM International CFM56-5B6, configured to carry 180 passengers, and the last scheduled maintenance was November 16, 2014.

Editor’s Note: More facts on AirAsia Indonesia Flight QZ8501 in the next page.